Drag/Acceleration Mods to improve ¼ mile times and unofficial track thread

[Edmund]

So in other words I should go back to stock plugs? What issues can a colder plug cause in my case? Is it just that they will go bad sooner and I need to keep an eye on them?

Since you have them in already, might as well try it out. But the issues you could have will be fouling of the plugs, due to getting loaded up with deposits that didn't burn off from having too low a tip temperature. If you drive aggressively during each of your trips, then it shouldn't be much of a problem.

I have seen folks putting in colder plugs to correct detonation issues, but the root cause was the engine just wanted a little less timing, and/or more fuel. And in our engines, we also have boost to contend with.

 

[Edmund]

I only plan on running wmi on the track.

Should I go back to oem plugs? Or buy the 1 step colder?

I would run it most if not all the time. The biggest drawback of meth systems is having safety nets. Many do not have them and if something goes wrong, then you have big problems. With the JB4, it has these safety features builtin, so enjoy the benefits of wmi 100% of the time.

See how these plugs treat you. And honestly, I think the oem plugs with wmi are likely fine for 500whp. After that, I would look to get less projected tipped plugs, but keep the same heat range. IF not available, then 1 step colder, and you would be good for anything short of big custom turbo setup.

 

[Angel]

I would run it most if not all the time. The biggest drawback of meth systems is having safety nets. Many do not have them and if something goes wrong, then you have big problems. With the JB4, it has these safety features builtin, so enjoy the benefits of wmi 100% of the time.

See how these plugs treat you. And honestly, I think the oem plugs with wmi are likely fine for 500whp. After that, I would look to get less projected tipped plugs, but keep the same heat range. IF not available, then 1 step colder, and you would be good for anything short of big custom turbo setup.

Thank You for the valuable information.

I guess for now I will keep these plugs and test them out. Should I inspect them at like 5k or so? What is a good mileage to inspect them?
Other them going bad because of carbon build up, are there other issues? I assume if I keep an eye on them I can change them before they go bad?

So you see no issues running wmi all the time? Also Should I run my car hard when possible to get the plugs hotter?

If I was to have issues would it be misfires again? and should I just go back to oem plug or 1 step colder if I was to have issues?

 

[Tonkabob]

I need to watch this.

So what you are saying is don't do Meth? Because it can be useless in our Stinger?

Not saying that but on this particular motor in the video due to the intake design it didn't work well. Our intake looks more meth friendly than that one but might still have issues and if it did I would suspect cylinders 2 and 6 would be the hot ones.

 

[Edmund]

My theory is based on it being a dry intake and is designed to flow air. If the water/meth is not well vaporized its going to fall out of suspension in the air and end up in the closest cylinders. This is exactly what happened in the video below although their intake is more convoluted than ours.
He was also getting bogging at first which could also be too much fuel in some cylinders.

What is Nitromethane, Anyway? - Hot Rod Magazine
Scroll down a page and watch the video on intercooler vs meth. Meth did not work at all with that cars intake.

100% agree. Too much for the application will lose power, as will injecting a liquid and not an evaporated mix. That turbo on the 5.3 ls, is running very efficiently. There isn't much heat to pull out. Plus they appear to be using too big a nozzle setup. If they dialed it back, it would evaporate before hitting the TB, and then you would have more evenly distributed mixture. Or turn up the boost, and then see it work its magic.

Our intake manifold distributes the air very evenly by design. Having the upper manifold off, I was able to see it comes into the center and then separates in open log plenum, before entering the cylinders.

 

[Edmund]

Thank You for the valuable information.

I guess for now I will keep these plugs and test them out. Should I inspect them at like 5k or so? What is a good mileage to inspect them?
Other them going bad because of carbon build up, are there other issues? I assume if I keep an eye on them I can change them before they go bad?

So you see no issues running wmi all the time? Also Should I run my car hard when possible to get the plugs hotter?

If I was to have issues would it be misfires again? and should I just go back to oem plug or 1 step colder if I was to have issues?

You will know very soon if the plugs work for your application. If you drive relatively easy, and they start misfiring. Drive it hard to burn off the deposits. If the car runs well again, then you know the plugs are too cold. From there, its decision time to see what plug to use.

I ran wmi in my Legacy for years. I was one of the biggest supporters of it on the LegacyGT board. About 83k miles in total. Countless gallons of 50/50 sunoco meth and distilled water. The car absolutely loved it.

 

[Angel]

You will know very soon if the plugs work for your application. If you drive relatively easy, and they start misfiring. Drive it hard to burn off the deposits. If the car runs well again, then you know the plugs are too cold. From there, its decision time to see what plug to use.

I ran wmi in my Legacy for years. I was one of the biggest supporters of it on the LegacyGT board. About 83k miles in total. Countless gallons of 50/50 sunoco meth and distilled water. The car absolutely loved it.

I got confused by your comment? So if when I drive easy the car misfires and then I drive it hard and the issue goes away then the plugs are too cold?

If I drive the car normal and and no issues come up then the plugs are ok ?

 

[Edmund]

I got confused by your comment? So if when I drive easy the car misfires and then I drive it hard and the issue goes away then the plugs are too cold?

If I drive the car normal and and no issues come up then the plugs are ok ?

Correct.

 

[Angel]

Correct.

Ok I will keep an eye out.

I assume that it will at least take 500-1000 miles until carbon builds up if there will be an issue. Since the plugs are brand new. I will remove the plugs at about 1k miles and inspect them, do you think that is a good idea.

 

[Edmund]

Ok I will keep an eye out.

I assume that it will at least take 500-1000 miles until carbon builds up if there will be an issue. Since the plugs are brand new. I will remove the plugs at about 1k miles and inspect them, do you think that is a good idea.

No it will not take long. If you just daily drive it like you normally do, you will know within a week or so if you put on say 250 miles a week.

If you exhibit no misfires, I wouldn't waste time in pulling them...

 

[Angel]

No it will not take long. If you just daily drive it like you normally do, you will know within a week or so if you put on say 250 miles a week.

If you exhibit no misfires, I wouldn't waste time in pulling them...

250 miles a week? My job is 4-5 miles from my house. I will make sure I drive more lol.

 

[Edmund]

250 miles a week? My job is 4-5 miles from my house. I will make sure I drive more lol.

LOL... I work 8 miles from home and struggle to put miles on as well. I put even less on the vette...

 

[Metalmania82]

My commute is 1.5 miles each way

 

[Angel]

My commute is 1.5 miles each way

You can ride your bike LOL....

Correction my job is 4.7 miles from my house one way.

 

[Christopher Léger]

I work 7 miles away.. i do 6,000 miles per week on 53' truck gone for 5 days, and i still manage to do 250 miles every week within 48h

 

[Angel]

I have great news everyone!

I beat the hell out of the Stinger yesterday on Map 8! I beat the Stinger like I beat my meat! The car loves it!



Drove the car on Map 8 last night for a while. Did about 8 WOT runs. Not a single issue.

Car is running strong and the plugs are taking the abuse well. The car did not miss a beat. I drove the car very hard.

I took some logs which I will have Terry review to confirm everything looks good.

In all honesty if the car was going to misfire and blow a plug last night would of been it LOL.

No leaks, no issues, no the install was a success. I will still keep an eye out to see if the plugs are too cold.

 

[Edmund]

Great news to hear! I wouldn't expect the plugs to be trouble in WOT situations, it is the putting around driving that can load them up.

What percentage of meth are you running?

 

[Angel]

Great news to hear! I wouldn't expect the plugs to be trouble in WOT situations, it is the putting around driving that can load them up.

What percentage of meth are you running?

I agree on the plugs but I will pull them out at about 500 miles or so just to inspect them.

Meth parameters

Meth flow 90
Boost additive 60
Meth psi 9

I will test again and turn up the boost a little more. I believe the max is boost additive 80 which is 8 psi.

 

[Edmund]

I agree on the plugs but I will pull them out at about 500 miles or so just to inspect them.

Meth parameters

Meth flow 90
Boost additive 60
Meth psi 9

I will test again and turn up the boost a little more. I believe the max is boost additive 80 which is 8 psi.

So is the meth/water ratio 50/50? Or are you running more meth with like a 75/25 %?

 

[Angel]

So is the meth/water ratio 50/50? Or are you running more meth with like a 75/25 %?

I'm running Boost Juice. I believe is 49/51